CVE-2019-8265: Uvnc Ultravnc

Critical severity, CVSS 9.8. EPSS: 3.1% chance of exploitation in the next 30 days.

UltraVNC revision 1207 has multiple out-of-bounds access vulnerabilities connected with improper usage of SETPIXELS macro in VNC client code, which can potentially result in code execution. This attack appears to be exploitable via network connectivity. These vulnerabilities have been fixed in revision 1208.

Affected products

• Uvnc Ultravnc: before 1.2.2.3 (fixed in 1.2.2.3)

Published 2019-03-08. Last modified 2026-06-17.